Malicious PDF — malware analysis report

Static analysis result for SHA-256 763d18386e0924f8…

MALICIOUS

PDF

39.8 KB Authoring application: Solid Converter PDF
MD5: 7bd0de5ce283b97bc599a9b80930532c SHA-1: 6117ece5f7ee42e7801c0baf8f5ac8a5fc821972 SHA-256: 763d18386e0924f8f6fd63a94cda274116042ffe8dc929ccc3d792ced8134dc9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as phishing or a trojan downloader. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://everycasino.info/uploads/1/3/0/6/130640013/tokuroja.pdf
    • http://processworkboston.com/uploads/1/3/0/2/130272575/xanaderavubinofaw.pdf
    • http://sleeprightproperties.co.uk/uploads/1/3/0/4/130435524/c8e99.pdf
    • http://mail.eppodoeve.nl/uploads/1/3/0/7/130740513/rufukifoxuxogodisu.pdf
    • http://heatherzidle.com/uploads/1/3/0/6/130639767/3861981.pdf
    • http://ceresevents.org/uploads/1/3/0/5/130538922/3e10449e2e.pdf
    • http://chatthillscommunity.com/uploads/1/3/0/8/130874001/dudepijajo.pdf
    • http://charlesheinerfiction.com/uploads/1/3/0/5/130539440/961536.pdf
    • http://hometownpartsandequipment.com/uploads/1/3/0/7/130775958/sobufifojorajon.pdf
    • http://bangladeshinvestbankbd.org/uploads/1/3/0/8/130873989/vakotijonazes.pdf
    • http://70v1l.slpny.com/uploads/1/3/0/6/130604951/130604951.html#change+from+active+voice+to+passive+voice+exercises
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e7f.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7F 16036 bytes
font_01_sfnt_off000045a4.bin
0e9befdc759a80482ea31bd242e3c56e33f32e499eafee68b9c28503dc62d6d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45A4 7928 bytes

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